William w



(MMOdel') W. WJJACKSON.

WRENCH FOR. BUNG BUSHINGS.

No. 268,408. Patented Deo. 5, 1882.

whle! ed: l y u Invenlor:

By @KM/ UNITED STATES PATENT EEICE,

WILLIAM IV. JACKSON, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-FOURTH TO WILLIAM B. LA PARLE, OF SAME PLAGE.

wRENoi-i FOR BUNG-Busi-HNGS.

SPECIFICATION forming part of Letters Patent No. 268,408, dated December 5, 1882,

Application filed September 29, 1882. (No model.)

To all whom it may concern Be it known that I, WILLIAM W. JAoKsoN, brewer and maltster, a citizen ot' the United i States, residing in Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Wrenches for Bun g-Bushin gs, of which the following is i a specification.

My invention relates to wrenches for bungbushings, in which an adjustable core removzo core-tightening device of which are simultaneously tightened upon each other and the core tightened in the bung-bushing; to providea wrench with an expansible core composed of a single piece' and a tightening device operating in the core, so that when said device is tightened in the core the core will be correspondingly tightened in the bung-bushing, but will contract to substantially its normal condition when the tightener is relaxed and in 3o condition to be readily withdrawn from the bushing; to provide a wrench with a core conforming to the bore of a bung-bushing and a corresponding tightening device fitting in said core, whereby the bushing may be maintained in its operative positionwhile being set to place in a barrel; to provide a wrench with an expansible core the outer or gripping teeth of which are formed in one piece with the core; and, finally, to provide a wrench with a core 4o adapted to grip or'take-hold of a bushing, and

with a tightening device which, co-operating with the core and bung, has the functions of a com pound screw,therebylessenin g the amount of applied power otherwise required to set a bung-bushing in its operative position in a barrel. I attain these objects by devices illustrated in the accompanying drawings, in which- Figure l isa side elevation ot' a wrench em- 5o bodying my invention in its operative position In a bung-bushing, which bushing is shown in cross-section; Fig. 2, a central longitudinal section of the same on the line y y of Fig. 3, and Fig. 3 a cross-section on the line rr x of Fig. 1. i

Similar letters of reference indicate thesame parts in the several figures ofthe drawings.

A represents a hollow, concave, cone-shaped core, internally screw-threaded from end to end, and provided externally with a series of longitudinal teeth, a, at intervals of its periphery, which teeth serve to grip or take hohl of the bung-bushing B when the core is tightened in the bung. This core is longitudinally slotted from end to end on one side, as shown at b, to permit the core to expand and contract, as hereinafter described, and at its top or base end of the cone is provided with a laterally-projecting Ilan ge, c, which prevents the core from slipping through a large-sized bushing, as it might otherwise do before the core could be expanded to grip the bushing. Fitting in this core is a tapering screw, G, which, having a larger diameter than the core, is tightened in the core when in the position relative thereto shown in Fig. 2, but which, when further tightened, expands the core and causes its teeth to grip the bushing, as shown in Fig. 3. This screw C, which is termed the tightening device,7 is provided witha head,D,hav ing formed therewith, or otherwise secured to it, handles d d for convenience in steadying the wrench and with it the bushing during the rst part of the operation of setting the bushing, and before a longer lever, E, passing through an eye in the head, is required to finally tighten the bushing in its operative position in the barrel, it being understood that the bushing is provided with an external screwthread which must be forced with considerable power to out a corresponding screw-thread in the barrel, so that when the bushing is forced to place it cannot possibly be accidentally detached. The core, and with it the tighteningscrew, is made of a sufficient length to adapt it for operating a considerable number of vary-` ing sizes of bushings, the inclination ot the core being such as to conform to and have a solid bearing against the inclined inner faces ot' such varying sizes of bushing.

The operation ot' the wrench is very clearly illustrated on the medium-sized bushing shown IOO in Fig. 2, wherein the wrench is shown in its operativeposition in the bushingafter the bushing is set. If the bushing were in position to be set, the wrench would be in substantially the same position, but the tightener a little farther up in the core, when by steadying the wrench by means of its handles while turning them the bushing would also be steadied and given a proper start in the barrel by reason of the core tightening in the bushing and the screw tightening in the core, so that in fact the handles ofthe wrench are in eftect handles to turn the core. As the resistance ot' the bushing increases the power to the handles is increased. Hence the screw correspondingly tightens in the core, and, expanding it, increases the force of the grip ot' the core corresponding with the resistance of the bushing,

and, as will be understood, the power of' the wrench and its operation in the bushing relative to the barrel are that cfa compound-screw. When the resistance ofthe bushing is too great for convenience in using the handles a longer leverage is obtained by employing the rod or lever E, passed through the eye in the head,

the bushing by this time having secured suftlcient hold to maintain itself perpendicular to the barrel. In this connection it may be stated that the core is never necessarily detached from the screw-tightener, and that when the diameter ot' the bushing corresponds with or is a little larger than the largest diameter ot' the core the flange c will rest on the bushing when the core is inserted until the tightener has been operated to expand the core and grip the bushing.

Instead of a an.ge,'c, projections or other suitabledevices may beemployed. So,also, the form of the gri ppin g-teeth a may be varied; or

they may be on detached plates dovetailed or otherwise secured to the core without departing from the spirit of my invention.

This wrench recommends itself for the simplicity and cheapness of its construction, and t'or the almost unlimited power it embodies and the absence of small detachable pieces liable to be Worn out or lost.

Having th ns described my invention, what I claim, and desire to secure by Letters Patent, 1s

l. The combination, with an expansible core composed of a single piece and provided with internal screw-threads, of a correspondingly screw-th rea-ded tigh tener ttingin and adapted to expand said core. substantially as described.

2. Thecombiuatioil,\vith a-hollow truncated cone shaped expansible core provided with internal screw threads, of a tapering screwtightener operatingin and adapted to expand said core, substantially as and for the purpose described.

3. The combination, with lthe internallyscrew-threaded expansible core, of a tapering screw-threaded tightener operatiugin said core, and provided with the rigid-and short levers d d and with a removable longlever, substantially as described.

4. In a bung-bushing wrench, a hollow truncated cone-shaped core adapted to be fitted in the bushing, and provided with a single longitudinal slot extending from end to end, and with a flange on its upper and base end, substantially as and for the purpose described.

WILLIAM W. JACKSON.

` Witnesses:

VILLrA'M B. LA PARLE, JNO. G. ELLIOTT. 

